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Making a data reduction diagram

- [Instructor] In this section, you will have to use…diagramming software.…Like I said before, I use online software called…Gliffy.com, and I'll show you how that turned out for me,…then, referring to our data reduction spreadsheet,…we'll walk through the diagram together.…There are a few reasons why you should make…a data reduction diagram.…Often these are included in publications.…First, it helps you be clear to your readers about how…you defined your subpopulation, that's the subject…of your study.…

Next, it allows the audience to evaluate selection bias.…Image that almost all of the alcohol drinking variables…were invalid, and that the ones that were filled in,…said the respondents drank very little alcohol.…That would suggest selection bias, or that people who…drank a lot didn't report it, and so they selected…themselves out of our criteria in a biased way.…Finally, having a clear diagram allows others to replicate…defining your exact subpopulation in their future studies,…if they want to build on your work.…

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Author

Released

12/12/2016

Analyze behavior and risk using R, the open-source statistical computing software. R provides an environment and a language you can use to analyze data, including the publicly available Behavioral Risk Factor Surveillance Survey (BRFSS) dataset. This course teaches core healthcare data science skills, including epidemiology, as well as how to perform a cross-sectional analysis, set up a data dictionary, develop metadata, determine confounders, apply exclusions, create diagrams, generate continuous and categorical outcome variables, and more. Join biotech expert and epidemiologist Monika Wahi as she first discusses design and ethical considerations, and then takes you through the steps of conducting a descriptive analysis.

This detailed, practical course is designed to help those in the field of public health, medicine, and data science to edit, analyze, and interpret data. Learn how to code new variables, use the forward-stepwise modeling process, and document your decisions. Find out how to visualize results by generating charts and graphics, and how to add tables and figures to your documentation. This course helps equip you to independently design, develop, and execute a full BRFSS analysis, and even publish your results in scientific publications or journals.